______ is a change of behavior in response to a direct request

Interdisciplinary collaboration in the study of infant development would be illustrated by all of the following except

a. early childhood educators working with economists b. stage theorists sharing data with researchers who endorse a more continuous view of development c. historians and pediatricians investigating trends in infant mortality rates d. geneticists studying delays in early language acquisition

What is responsible for the circadian rhythm of wakefulness and sleepiness?

a. An area in the brain generates this rhythm b. The body responds to changes in the temperature of the environment. c. Each individual learns this rhythm by imitating others of its species. d. The body responds to the same influences that produce the tides.